In September, Saint Petersburg typically sees daytime highs of 14.6°C and overnight lows around 6.6°C. Compared to the annual average high of 8.0°C, September runs +6.6°C.
September in Saint Petersburg averages a daytime high of 14.6°C and an overnight low of 6.6°C.
September runs +6.6°C compared to Saint Petersburg's annual average high of 8.0°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 14.6°C and cooler evenings around 6.6°C.